The Demon King, intent on dominating humanity, continues his invasion. His daughter, Lily Fordefelt, is ordered to attend a Hero Academy to crush the aspiring heroes.

However, as she spends her days alongside the prospective Hero Party members she meets there, experiencing their precious, Yuri-filled lives, she reaches a certain conclusion. And that conclusion is...

"The Hero Party is so precious... I should defect from the Demon King's Army!"

This is the story of Lily, the protagonist, who, having discovered the preciousness of the Hero Party, becomes utterly captivated by them, thoroughly betrays the Demon King's Army, and sticks closely to Yuusha.

It's a tale of her dreaming of peace between demons and humanity.

*This work is also serialized on NovelUp+.*